The Impact Of Three Longwall Coal Mines On Streamflow In The Appalachian Coalfield

Dizon, Denise Y.
Organization: International Conference on Ground Control in Mining
Pages: 14
Publication Date: Jan 1, 1990
The objectives of this study were to document the hydrologic impacts of longwall mining on streams, identify the factors affecting the extent of stream dewatering, and develop empirical trends to predict the extent of dewatering and recovery of streams in advance of mining. This study on stream impacts is a companion to a stud; conducted on ground water impacts from longwall mining, which was done as part of the same research project at the' same locations and times. The study areas are three mine sites in north- central West Virginia. Mine A, located in Upshur County, has relatively thin mine overburden under the valley streams (105-115 feet). Stream monitoring there continued the earlier work of Cifelli and Rauch (1). Stream dewatering was severe with streams often going dry over the longwall panels during baseflow conditions. The lost water was probably flowing to the mine. Dewatering began in streams over the mine entry areas adjacent to the panels and as much as 380 feet from the nearest panel edge. The angles of dewatering influence ranged 22 to 72 degrees with respect to the nearest mined panel edge. Discharge then typically increased as the streams- flowed across the panel edge, but then decreased again over the panels. These streams were often ponded by local reversals in hydraulic gradient caused by land subsidence, and often dried up after flowing a few hundred feet across the panels. This occurred over panels that were previously mined up to eight months before. Mine B, located in Monongalia County, has relatively thick mine overburden (475-485 - feet) under the major stream. Stream dewatering was severe there during warm season baseflows, with complete dewatering occurring then over the longwall panels. This dewatering occurred over mined panels up to five years old, probably in response to a major anticlinal axis lineament and fracture zone in the stream valley. Mine C. located on the West Virginia -Pennsylvania border, has relatively thick mine overburden (about 585-630 feet) under the monitored streams there. stream dewatering was only partial, and these streams typically recovered their lost discharge downstream of the mine, indicating that lost water was not recharging to the mine. Only longwall panels less than one year old were associated with stream dewatering.
Full Article Download:
(5012 kb)


Additional chapters/articles from the SME-ICGCM book Ninth Conference on Ground Control Mining Proceedings (ICGCM) 9th

Multiple-Seam Mining - A State-Of-The-Art Review
Design Aspects In Multiple-Seam Mining: Case Studies
Jenmmar Compression Roof Control System
Specialty Truss System And Their Performance
A Case Study Of Grouted Roof Bolt Loading In A Two-Entry Gat
Analysis And Field Testing Of Presupport Application In Coal
Development Of Roof Stitching As A Method Of Support In Indi
Control Of Roadway Closure In Underground Coal Mines By Side
An Application Of Fem Back Analysis Method To Mine Roadway
Controlled Blasting During Drifting In Hard Rock Mine
Field Test Results On Dyna-Rok And Dyna-Rok Plus Anchors
Mine Pillar Stability Analysis Using Fem Methods - Two Case
An Analytical Approach For The Estimation Of Pillar Strength
International Conference On Ground Control In Mining Design
A New Rock Mass Failure Criteria Based On Rate Of Movement
Practical Consideration In Longwall Support Selection
Mine-Wide Monitoring Applications In Ground Control Research
Longwall Stability Analysis Of A Deep, Bump-Prone Western Co
Stability And Control Of Immediate Roof Of Fully Mechanized
An Analysis Of Longwall Shield Cycle Effectiveness By Polyco
The Impact Of Three Longwall Coal Mines On Streamflow In The
Progressive Failure Of The V-Day Mine And A Comparison With
Controlling Subsidence Effects Using Partial Backfilling
Potential Of A Void Diffusion Model To Predict Longwall Subs
The Use Of Rim- To Detect Geologic Anomalies In The Clarion
The Effect Of Hazardous Geologic Structures On Gateroad Stab
Improved Source Location And Evaluation Of Seismic Events Ov
Application Of Short-Term Time-Dependent Plate Loading Tests
Determination Of Classification Parameters For Clay - Bearin
Intrinsic Response Of Borehole Pressure Cells Laboratory Cal
Application Of Sliding Roof Bar Powered Support For Thick-Se
Drainage Of Water From Abandoned Mines By Horizontal Drillin
A Statistical Analysis Of Falls Of Ground In South African C
Three-Dimensional Analysis Of Mine Dump Point Stability
Birth Of A Longwall-Initial Planning To Post-Subsidence Miti
Progressive Hangingwall Caving And Subsidence Prediction At